Comparison

TOR Web Browser Dark Onion vs Pipe Math Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TOR Web Browser Dark Onion

Experience secure and private internet browsing with this advanced TOR browser. Connect to the internet through nodes in over ten countries for enhanced anonymity and freedom. Enjoy a fast, ad-free experience that takes your online security to the next level.

Highlights
  • High privacy internet surfing
  • Connect from 10+ countries
  • Fast and private browsing
  • AdBlock included
  • Onion browser functionality
  • Maximum security
Features
Read full description

Perfect TOR browser for high privacy Internet surfing. Connect to the Internet from more than ten countries! Fast and private. Tor browser is a fast and full-featured onion browser which provides maximum privacy and security, a combination of private browsing mode and TOR connection provides you maximum privacy. Take your Internet freedom and security to the next level by connecting to nodes in 10+ countries. If you have any questions, please contact me: https://bitbucket.org/snippets/AlekseyGerbyn/ Information about the auto-renewable nature of the subscription: - Unlimited access to TOR browser - Any time you can use Tor browser with exit nodes and if you want to continue to use Tor browser your monthly or weekly subscription should be continued. - The length of the subscription. Subscription periods are 1 week, 1 month, 3 months and 1 year. Every 1 week or 1 month or 3 months or 1 year your subscription renews accordingly. - Payment will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period. - You can cancel your subscription via this url: https://support.apple.com/en-us/HT202039 - The price of the subscription is $3.99 for weekly subscription and weekly subscription with trial. - Privacy policy: http://bit.ly/2GRrMw6 - Terms and conditions - http://bit.ly/2q4ODL2 - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

About

Pipe Math Pro

Features
Read full description

Know your travel. Know your cut. Get back to the job. Pipe Math Pro puts practical plumbing calculations and clear pipe diagrams in your pocket. Enter your measurements, see where they belong on the picture, and read the result in familiar tape-measure fractions. Designed by a plumber for plumbers, with the measurements you need close to the diagram and explanations available when you need them. ONE PURCHASE. ALL THE TOOLS. No ads. No subscriptions. No yearly fees. No in-app purchases. The calculations work offline, with no account required. OFFSETS: 22½°, 45° AND 60° • Calculate travel from spread. • Enter the fitting allowance and choose one or two deductions. • See spread, travel, fitting allowances and finished cut length on the pipe. • Read travel and cut pipe as separate results. ROLLING OFFSETS • Enter horizontal and vertical offsets. • Calculate true offset, travel and cut length. • Follow a 3-D pipe diagram showing each measurement. • Choose 22½°, 45° or 60° fittings. SPREAD ALLOWANCE • Keep parallel offset runs equally spaced. • Enter the first pipe cut, spacing and number of pipes. • Calculate the next pipe lengths with fitting allowances. • Work with 22½°, 45° and 60° offsets. PIPE SLOPE • Calculate rise over the pipe run. • Choose 1/16, 1/8, 1/4, 1/2 or 5/8 inch per foot, or use the percentage wheel. • See the high-end rise above level ground. PLUMBING QUICK MATH • Pipe volume per foot, total volume and water weight. • Tank capacity and partial fill for rectangular, vertical cylinder and horizontal cylinder tanks. • Water weight, including an empty pipe or tank's weight. • Water head and pressure: feet, PSI and kPa. • Pipe pressure loss with optional elevation and fittings inputs. • Flow and velocity, in either direction. • Fill or drain time, or the flow needed for a chosen time. • Measurement diagrams, input guidance and formulas. CONVERSIONS THAT FIT THE WAY YOU WORK • Feet and inches to metres, centimetres, or metres plus centimetres. • Reverse the direction in a tap. • Litres, Imperial gallons and US liquid gallons, clearly labelled. • Decimal inches to tape-measure fractions. • A basic calculator for everyday arithmetic. Enter decimal inches, fractions or mixed fractions in supported measurement fields. Displayed tape measurements round to the nearest 1/16 inch; calculations retain their underlying precision. Pipe Math Pro is the new version of Pipe Math. If you already own Pipe Math, this update is included with your existing App Store purchase. Use the actual inside dimensions and fitting allowances for your materials. Water pressure-loss results use the Hazen–Williams model and the selected pipe coefficient.

Screenshots

TOR Web Browser Dark Onion4 screens
Pipe Math Pro4 screens

Verdict

The call

The clearest difference is price: TOR Web Browser Dark Onion at Free against Pipe Math Pro's $9.99. TOR Web Browser Dark Onion also leads on update cadence (every 2 months vs every 10 months) and device support (3 vs 1). Pipe Math Pro's advantage is in-app purchases (none vs 7). On ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

TOR Web Browser Dark Onion is free to download; Pipe Math Pro costs $9.99 up front. TOR Web Browser Dark Onion sells 6 in-app purchases, starting at $3.99 per 7 days. Pipe Math Pro asks for nothing beyond the download.

UpkeepUpdate frequency

TOR Web Browser Dark Onion ships an update every 2 months, Pipe Math Pro every 10 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

Scorecard5 real differences · 5 level
TOR Web Browser Dark Onion versus Pipe Math Pro: the parameters behind the verdict, then further details
ParameterTOR Web Browser Dark OnionPipe Math Pro
PriceFree — better$9.99
Rating4.0 (3.1K ratings) — better—
Positive reviews52.9% of reviews—
Number of ratings3.1K — better—
Update frequencyEvery 2 months — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.6
Further details — not scored
Size65 MB4 MB
Age rating17+4+
DeveloperONE FTS PTE. LTD.Antonio Vitella

Bugs and requests

TOR Web Browser Dark Onion

Reported bugs

3 issues
  • Subscription issues
  • Compatibility problems
  • Frequent crashes

Requested features

3 requests
  • Free version or trial period
  • Improved stability & performance
  • Better customer support

Pipe Math Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

TOR Web Browser Dark Onion

Subscriptions6
  • Weekly subscription3 Days trial2 variants$3.997 Days
  • Full version for one week$3.997 Days
  • Full version for one month$9.991 Month
Show 3 more
  • Evil Onion Plus - Monthly3 Days trial$9.991 Month
  • Evil Onion Plus - 3 Months3 Days trial$19.993 Months
  • Evil Onion Plus - Annual3 Days trial$39.991 Year
None

Pipe Math Pro

No in-app purchases

Questions

Is TOR Web Browser Dark Onion free?
TOR Web Browser Dark Onion is free to download, with in-app purchases available.
Is Pipe Math Pro free?
Pipe Math Pro costs $9.99, with no in-app purchases.
Do TOR Web Browser Dark Onion or Pipe Math Pro have ads?
Neither TOR Web Browser Dark Onion nor Pipe Math Pro shows ads.
Which is updated more often, TOR Web Browser Dark Onion or Pipe Math Pro?
TOR Web Browser Dark Onion ships an update every 2 months, and Pipe Math Pro every 10 months. Most recently, TOR Web Browser Dark Onion was updated on October 7, 2026 and Pipe Math Pro on October 5, 2026.

Other comparisons